Fixed MingW build's handling of debug d postfix.

CMakeModules/OsgMacroUtils.cmake

@@ -282,12 +282,7 @@ MACRO(SETUP_PLUGIN PLUGIN_NAME)
         ADD_LIBRARY(${TARGET_TARGETNAME} STATIC ${TARGET_SRC} ${TARGET_H})
     ENDIF(DYNAMIC_OPENSCENEGRAPH)
 
-    #not sure if needed, but for plugins only Msvc need the d suffix
-    IF(NOT MSVC)
-        IF(NOT UNIX)
-            SET_TARGET_PROPERTIES(${TARGET_TARGETNAME} PROPERTIES DEBUG_POSTFIX "")
-        ENDIF(NOT UNIX)
-    ELSE(NOT MSVC)
+    IF(MSVC)
         IF(NOT CMAKE24)
             SET_OUTPUT_DIR_PROPERTY_260(${TARGET_TARGETNAME} "${OSG_PLUGINS}")        # Sets the ouput to be /osgPlugin-X.X.X ; also ensures the /Debug /Release are removed
         ELSE(NOT CMAKE24)
@@ -316,7 +311,7 @@ MACRO(SETUP_PLUGIN PLUGIN_NAME)
             ENDIF(OSG_MSVC_VERSIONED_DLL)
 
         ENDIF(NOT CMAKE24)
-    ENDIF(NOT MSVC)
+    ENDIF(MSVC)
 
     SET_TARGET_PROPERTIES(${TARGET_TARGETNAME} PROPERTIES PROJECT_LABEL "${TARGET_LABEL}")
     SET_TARGET_PROPERTIES(${TARGET_TARGETNAME} PROPERTIES FOLDER "Plugins")